Portable hoisting-jack



- J. B. BLAW.

PORTABLE HOISTING JACK.

APPLICATION FILED OCT-13,1919. 1,358,612.

Patented Nov. 9, 1920.

i x N I i 5. 2...

I'll I PATENT OFFICE.

JACOB B. BLA'W', 0E ATLANTIC CITY, NEW JERSEY.

PORTABLE HOISTING-J'ACK.

Specificationof Letters latent.

Patented Nov. 9, 1920.

Application filed October 13, 1919. Serial No. 330,236.

, To all whom it may concern:

Be it known that I, JACOB B. BLAw, a. citizen of the United States, and resident of Atlantic City, county of Atlantic, and State of New Jersey, have invented an Improvement in Portable Hoisting-Jacks, of which the following is a specification. 7

My invention has for its object the construction of a portable jack which may be quickly positioned in a window opening and provide hoisting means for elevating fire hose, ladders and other articles to upper stories of buildings, when necessary in case of. fire or for other reasons.

A further object is to provide certain features of construction in the make up of my improved 10k that it may be collapsed for transportation and handling and may also be adjusted to proper position from windows of various shapes and proportions' My object is also to provide a construction of j aok in which the horizontal main frame is furnished with rollers over which todraw the hose or other article into the building, and also provided with oblique struts extending above the main or horizontal frame to constitute a brace frame having one or more blocks or sheaves hung therefrom over which the hoisting cables are guided, whereby the articles may be elevated well up within easy reach from the window opening.

My object is further to construct the main frame with the rollers thereof journaled in adjustable blocks adapted for adjustment horizontally along the length of the frame, whereby the rollers may be properly positioned with respect to the window sill of the building.

My invention also consists of improvements hereinafter described whereby the above objects and results are attained said improvements comprising certain organization and combination of parts which are fully described hereinafter and moreparticularly defined in the claims.

Referring to the drawings: Fig. 1 is a perspective view of my improved hoisting jack in position in a window opening of a building; and Fig. 2 is a cross section of the main frame of the jack adjacent one of the rollers. V v

1 is the wall of the building, 2 is the window sill. 3 the window frame and a one of the mold or string courses on the building.

The main frame of the jack consists of two horizontal angle irons 5 which are connected at the inner ends by a cross bar 5 and at the outer ends by the hinged brace frame 6. This brace frame 6 is formed of angle iron bent in rectangular or arch shape and provides cross bars at top and bottom. It is hinged at 19 to the outer ends of the main frame angle irons, 5, 5, and so that it extends above and below the said frame and may be adj usted to an angle therewith so that its lower end may rest against the outer wall of the building as shown. This brace frame 6 is held in adjusted position by the locking bars 11 which'are hinged at the lower ends at 20 to the brace frame and attached at their other ends to the angle irons 5, 5, of the main frame by looking pins or bolts 12. The angle irons 5, 5, are each provided with a plurality of holes 18 along their length and in these the pins 12 may be adjusted to insure the angle which may be required for the brace frame 6. The upper cross bar of the brace frame is provided with swivel eyes 13, from which are hung blocks or sheaves 14 over which hoisting cables 15 travel for lifting articles such as fire hose 16 or ladders 17, for example.

The inner end of the horizontal angle irons are provided with vertical holes through which the retaining pins 9 extend downward back of the window sill to prevent outward movement of the jack when adjusted in position.

7, 7 are two transverse rollers preferably flanged at their ends and carried by adjustable blocks 8 secured to the angle iron'side frames .5, 5. The blocks are angular in shape at their lower ends, said angular parts fitting theinner faces of the angle iron side frames 5, 5, as shown in Fig. 2. These blocks 8 are adjustable along the angle irons 5 5, and may be secured thereto in any suitable manner and preferably by pins or bolts 10 extending through holes in the blocks and holes 18 in the angle irons. In this manner the rollers 7 may be adjusted to positions just above the, window sills and adjacent the inner and outer portions thereof, so as to Provide a suitable roller guiding means over which the hose or other articles may be easily pulled into the building through the window opening.

The construction of jack shown has advantages in facility of adjustment of its parts to adapt it to any window or building wall,

- and to capacity for raising the hose or other articles well up clear ,of the projecting mold or string course i of the building and into position to be easily grasped and disengaged from the cables. It will also be observed that by using an arch shape form for the brace frame there is a maximum opening space provided through which the articles may pass to the rollers, and at the same time, compactness and strength of construction is maintained.

It will now be apparent that l have def vised a novel and useful construction which embodies the features of advantage enumerated as desirable, and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory andreliable results, it is to be understood that I do not restrict myself to the details, as the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is: V

1. A portable hoisting jack for windows, consisting of a horizontal frame adapted to rest upon the window'sill and having at its outer end a brace frame extending above and below the horizontal frame and held at an angle thereto, said brace frame adapted for contact with the outer wall of the building below the window sill, combined with a block secured to the upper end of the brace frame at a higher elevation than the horizontal frame and adapted for guiding a hoisting cable.

2. A portable hoisting jack for windows,

consisting of a horizontal frame having at its outer end a brace frame extending above and below the horizontal frame and held at an angle thereto, said brace frame adapted for contact with the outer wall of the building, combined with a block secured to the upper end of the brace frame at a higher elevation than the horizontal frame and adapted for guiding a hoisting cable, and a roller extending transversely of the horizontal frame so as to provide a large space between'it and the brace frame through which articles elevated maybe passed and guided over the rollerinto the building;

. 3. A portable hoisting jaclr for windows, consisting of a horizontal frame having at its outer end a brace frame extending above and below the horizontal frame and held at an angle thereto, said brace frame adapted for contact with the outer wall of the building, combined with a'block secured to the upper end of the brace frame at a higher elevation than the horizontal frame and adapted for guiding a hoisting cable, means for holding the horizontal frame to the window sill of the building, and a transverse guiding roller between said means'and the brace frame and adjustably secured to the horizontal frame whereby it may be positioned properly with respect to the outer portion of the window sill.

4. A portable hoisting jack for windows,

consisting of a horizontal frame having atits outer end a brace frame extending above and below the horizontal frame and held at an angle thereto, said brace frame adapted for contact with the outer wall of the building, combined with a block secured to the upper end of the brace frame at a higher elevation than the horizontal frame and adapted for guiding a hoisting cable, and a plurality of horizontal transverse rollers arranged parallel and relatively adjust able with respect to each other and to the horizontal frame adjacent its end most distant from the brace frame, whereby said rolllers may be adjusted above the window sil.

5. The invention according to claim 3, further restricted by having the adjustable means for securing the roller to the horizontal frame, comprising supporting blocks carrying the roller. and adjustable along the horizontal frame and also secured thereto by means extending through the blocks and frame.

6. In a portable hoisting jack, a horizontal frame providing two angle irons havingholes along their sides, means for holding the frame to a window sill, an arch shaped brace frame having its sides hinged to theouter endsof the angle irons of the horizontal frame and so as to provide an upwardly extending frame having a cross bar abovethe outer end of the horizontal frame, hoisting means attached to the cross bar, and locking bars connected with-the arch shaped brace frame and'adjustably JAooB VB. BLAW. 

